Test Bank for Contemporary Business Mathematics 11th Ca Edition by Hummelbrunner

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Contemporary Business Math w/ Canadian Apps., 11e (Hummelbrunner/Coombs) Chapter 2 Review of Basic Algebra 1) Simplify: 7m - 2m - 3m Answer: 2m Diff: 1 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

2) Simplify: 4x - 3y - 4x - 2y Answer: -5y Diff: 1 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

3) Simplify: 4x - 6y - 4x - 2y Answer: -8y Diff: 1 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

4) Simplify: x + 0.16x Answer: 1.16x Diff: 1 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

5) Simplify: x - 0.32x Answer: 0.68x Diff: 1 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

6) Simplify: x - 0.62x Answer: 0.38x Diff: 1 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

7) Simplify: 3ax - 4x + 1 - 7 + 3x - 4ax Answer: -ax - x - 6 Diff: 1 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

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8) Simplify: -(4 - 6a) - (-4 + 3a) Answer: -4 + 6a + 4 - 3a = 3a Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

9) Simplify: -(4 - 6a) - (-8 + 6a) Answer: -4 + 6a + 8 - 6a = 4 Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

10) Simplify: -(3m - 6m - 5) - (4 - 7m - 2m) Answer: -3m + 6m + 5 - 4 + 7m + 2m = 12m + 1 Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

11) Simplify: (7a - 7b) - (-3a + 9b) - 11b Answer: 7a - 7b + 3a - 9b - 11b = 10a - 27b Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

12) Simplify: (8a - 7b) - (-3a + 7b) - 11b Answer: 8a - 7b + 3a - 7b - 11b = 11a - 25b Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

13) Simplify: -7(9a) Answer: -63a Diff: 1 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

14) Simplify: -9a(-5b) Answer: 45ab Diff: 1 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

15) Simplify: -5a(-5b) Answer: 25ab Diff: 1 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

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16) Simplify: -6m(-3m) Answer: 18m2 Diff: 1 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

17) Simplify: 3a(-3b)(-4c)(-1) Answer: -36abc Diff: 1 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

18) Simplify: -2a(-3b)(-4c)(-5) Answer: 120abc Diff: 1 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

19) Simplify: 5(4x - 2) Answer: 20x - 10 Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

20) Simplify: -3x(4 - 2b - b) Answer: -12x + 6bx + 3bx = -12x + 9bx Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

21) Simplify: -3x(4 - 2b - 2b) Answer: -12x + 6bx + 6bx = -12x + 12bx Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

22) Simplify: -5(8a - b) - 2(-6a + 9b) Answer: -40a + 5b + 12a - 18b = -28a - 13b Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

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23) Simplify: 8(9y - 4) - 2(y - 1) - (1 - 3y) Answer: 72y - 32 - 2y + 2 - 1 + 3y = 73y - 31 Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

24) Simplify: 4(9y - 4) - 2(y - 1) - (1 - 3y) Answer: 36y - 16 - 2y + 2 - 1 + 3y = 37y -15 Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

25) Simplify: (5m - 2n)(m - 12n) Answer: 5m2 - 60mn - 2mn + 24n2 = 5m2 - 62mn + 24n2 Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

26) Simplify: (3a - 1)(a - 3a + 1) Answer: 3a2 - 9a2 + 3a - a + 3a - 1 = -6a2 + 5a - 1 Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

27) Simplify: (4a - 1)(a - 3a + 1) Answer: 4a2 - 12a2 + 4a - a + 3a - 1 = -8a2 + 6a - 1 Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

28) Simplify: 2(a - 1)(7a - 3) - 3(6a - 2)(2a + 1) Answer: 2(7a2 - 3a - 7a + 3) - 3(12a2 + 6a - 4a - 2) = 14a2 - 6a - 14a + 6 - 36a2 - 18a + 12a + 6 = -22a2 - 26a + 12 Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

29) Simplify: 50xy ÷ (-5x) Answer: -10y Diff: 1 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

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30) Simplify: 60xy ÷ (-5xy) Answer: -12 Diff: 1 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

31) Simplify: (-45a3b) ÷ 15a2 Answer: -3ab Diff: 1 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

32) Simplify: (-64ab) ÷ (8ab) Answer: -8 Diff: 1 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

33) Simplify: (-8ab) ÷ (8a) Answer: -b Diff: 1 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

34) Simplify: (21x - 36) ÷ (-3) Answer: -7x + 12 Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

35) Simplify: (-a3 - 11a2 - 3a) ÷ (-a) Answer: a2 + 11a + 3 Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

36) Simplify: (-a3 - 10a2 - 3a) ÷ (a) Answer: -a2 - 10a - 3 Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

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37) Evaluate: 4x2 - 10xy - 8y2 for x = -3, y = 5 Answer: 4x2 - 10xy - 8y2 = 4(-3)2 - 10(-3)(5) - 8(5)2 = 4(9) + 150 - 8(25) = 36 + 150 - 200 = -14 Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

38) Evaluate y: y = (3x2 - x - 1) - (5 - 2x - x2) for x = -3 Answer:

(3x2 - x - 1) - (5 - 2x - x2)

= [3(-3)2 - (-3) - 1] - [5 - 2(-3) - (-3)2] = (27 + 3 - 1) - (5 + 6 - 9) = (29) - (2) = 14.5 - 0.5 = 14.0 Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

39) Evaluate R: R =

for I = 83, P = 845, T =

Answer:

=

=

=

= .163708

Diff: 3 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

40) Evaluate r: r = Answer: r =

, where I = 116, P = 1760, t = =

=

= .1603788

Diff: 3 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

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41) Evaluate r: r =

, where I = 200, P = 800, t =

Answer: r =

=

=

= .6083333

Diff: 3 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

42) Evaluate K: K = Answer:

=

for N = 32, C = 20, P = 1859, n = 26 =

=

= .0255

Diff: 3 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

43) Evaluate P: P = A(1 - RT) for A = 1400, R = 0.185, T = Answer: A(1 - RT) = 1400

= 1400 [1 - .185 ∗ 7]

= 1400[1 - .1295] = 1400[.8705] = 1218.7 Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

44) Evaluate P: P = A(1 - RT) for A = 700, R = 0.185, T = Answer: A(1 - RT) = 700

= 1400 [1 - .185 ∗ 7]

= 700[1 - .0925] = 700[.9075] = 635.25 Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

45) Evaluate p: p = s

, where s = 3120, r = 0.123, t = 295

Answer: p = 3120

= 3120[1 - .123 ∗ .8194444]

= 3120[1 - .1007917] = 3120[.8992083] = 2805.53 Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

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46) Evaluate P: P = Answer:

=

for A = 752, R = 0.145, T = =

=

= 689.5129

Diff: 3 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

47) Evaluate s: s =

Answer: s =

, where p = 3411.50, r = 0.0925, t = 75

=

=

= 3347.001

Diff: 3 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

48) Evaluate the value of FV, if FV = PMT Answer: FV = 750

, PMT = $750, i = 0.025, and n = 10.

= $8402.54

Diff: 3 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

49) Evaluate: 16 Answer: 1 Diff: 1 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

50) Evaluate: (-1)14 Answer: 1 Diff: 1 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

51) Evaluate: (-1)13 Answer: -1 Diff: 1 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

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52) Evaluate: Answer: Diff: 1 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

53) Evaluate: (-0.1)7 Answer: -0.0000001 Diff: 1 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

54) Evaluate: (-0.1)4 Answer: 0.0001 Diff: 1 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

55) Evaluate: m0 Answer: 1 Diff: 1 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

56) Evaluate: (-5)-2 Answer: or .04 Diff: 2 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

57) Evaluate: (-5)-3 Answer: or -.008 Diff: 2 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

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58) Evaluate: Answer:

or 3.375

Diff: 2 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

59) Evaluate: (1.05)0 Answer: 1 Diff: 1 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

60) Evaluate: -(288888)0 Answer: -1 Diff: 1 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

61) Evaluate: (3)2(3)4 Answer: (3)2(3)4 = 36 = 729 Diff: 2 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

62) Simplify: (-4)4 ∗ (-4) Answer: (-4)4 + 1 = (-4)5 = -1024 Diff: 2 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

63) Simplify: (-4)3 ∗ (-4) Answer: (-4)3 + 1 = (-4)4 = 256 Diff: 2 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

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64) Simplify: (-3)7 ÷ (-3)4 Answer: (-3)7-4 = (-3)3 = -27 Diff: 2 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

65) Simplify: (m4)5 Answer: (m4)5 = m4 × 5 = m20 Diff: 1 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

66) Simplify: (m5)5 Answer: (m5)5 = m5 × 5 = m25 Diff: 1 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

67) Simplify: [(-4)4]3 Answer: (-4)4 × 3 = (-4)12 = 16777216 Diff: 2 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

68) Simplify: m13 ÷ m6 Answer: m13-6 = m7 Diff: 1 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

69) Simplify: (-1)4(-1)2(-1)5 Answer: (-1)4 + 2 + 5 = (-1)11 = -1 Diff: 1 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

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70) Simplify: Answer: x3 + 5 - 4 = x4 Diff: 2 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

71) Simplify: Answer: x16 + 4 - 2 = x18 Diff: 2 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

72) Simplify:

÷

Answer: [1/9]8-3 = [1/9]5 = 1/59049 Diff: 2 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

73) Simplify:

÷

Answer: [-3/5]9 - 4 = [-3/5]5 = -243/3125 = -.07776 Diff: 2 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

74) Simplify: 1.005240 ÷ 1.005160 Answer: 1.005240 -160 = 1.00580 = 1.4903386 Diff: 2 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

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75) Simplify: Answer: [-3/8]6 × 3 = [-3/8]18 = (-3)18/818 or .0000000215062 Diff: 2 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

76) Simplify: (1 - r)2(1 - r)3(1 - r) Answer: (1 - r)6 Diff: 2 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

77) Simplify: (1 - r)3(1 - r)4(1 - r) Answer: (1 - r)8 Diff: 2 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

78) Simplify: [(1 - r)51]2 Answer: (1 - r)51 × 2 = (1 - r)102 Diff: 2 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

79) Simplify: (2xy)5 Answer: 25x5y5 = 32x5y5 Diff: 2 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

80) Simplify: Answer:

=

Diff: 2 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

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81) Simplify: Answer:

=

Diff: 2 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

82) Simplify: 57 ÷ 5-3 Answer: 57 - (-3) = 510 Diff: 3 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

83) Simplify: Answer: Diff: 3 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

84) Compute: Answer: = 14.35 Diff: 1 Type: SA Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

85) Compute: Answer: 1.01 Diff: 2 Type: SA Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

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86) Compute: Answer: 1.03 Diff: 2 Type: SA Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

87) Compute: Answer: .5 Diff: 2 Type: SA Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

88) Compute: Answer: 1.010595566 Diff: 2 Type: SA Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

89) Compute: Answer: 1.06 Diff: 2 Type: SA Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

90) Compute: 19562/5 Answer: 20.727529 Diff: 2 Type: SA Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

91) Compute: 32.53/4 Answer: 13.611705 Diff: 2 Type: SA Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

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92) Compute: 323/4 Answer: 13.45434264 Diff: 2 Type: SA Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

93) Compute: Answer: 1.2423925 Diff: 2 Type: SA Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

94) Compute: 1.28-5/14 Answer: .9156104 Diff: 3 Type: SA Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

95) Compute: Answer:

=

= 19.935074

Diff: 3 Type: SA Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

96) Compute the value of Answer:

=

= 15.61388

Diff: 3 Type: SA Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

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97) Compute the value of Answer:

=

= 8.982585006

Diff: 3 Type: SA Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

98) Evaluate: 50.00 Answer: 50.00 = 50 = 50 = 50 = 50(60.40198318) = 3020.10 Diff: 2 Type: SA Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

99) Express in logarithmic form: 39 = 19683 Answer: 9 = log3 19683 Diff: 2 Type: SA Page Ref: 63-69 Topic: 2.4 Logarithms - Basic Aspects Objective: 2-4: Write exponential equations in logarithmic form and use an electronic calculator equipped with a natural logarithm function to determine the value of natural logarithms.

100) Express in logarithmic form: 56 = 19683 Answer: 6 = log5 15625 Diff: 2 Type: SA Page Ref: 63-69 Topic: 2.4 Logarithms - Basic Aspects Objective: 2-4: Write exponential equations in logarithmic form and use an electronic calculator equipped with a natural logarithm function to determine the value of natural logarithms.

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101) Express in logarithmic form: 10-4 = 0.0001 Answer: log10 .0001 = -4 Diff: 2 Type: SA Page Ref: 63-69 Topic: 2.4 Logarithms - Basic Aspects Objective: 2-4: Write exponential equations in logarithmic form and use an electronic calculator equipped with a natural logarithm function to determine the value of natural logarithms.

102) Express in logarithmic form: e-3x = 12 Answer: e-3x = 12, -3x = loge 12, or 1n 12 = -3x Diff: 2 Type: SA Page Ref: 63-69 Topic: 2.4 Logarithms - Basic Aspects Objective: 2-4: Write exponential equations in logarithmic form and use an electronic calculator equipped with a natural logarithm function to determine the value of natural logarithms.

103) Express in exponential form: log3 Answer: log3

= -4

= -4, 3-4 =

Diff: 2 Type: SA Page Ref: 63-69 Topic: 2.4 Logarithms - Basic Aspects Objective: 2-4: Write exponential equations in logarithmic form and use an electronic calculator equipped with a natural logarithm function to determine the value of natural logarithms.

104) Express in exponential form: log10 Answer: log10

= -2

= -2, 10-2 =

Diff: 2 Type: SA Page Ref: 63-69 Topic: 2.4 Logarithms - Basic Aspects Objective: 2-4: Write exponential equations in logarithmic form and use an electronic calculator equipped with a natural logarithm function to determine the value of natural logarithms.

105) Express in exponential form: ln e5 = 5 Answer: e5 = e5 Diff: 2 Type: SA Page Ref: 63-69 Topic: 2.4 Logarithms - Basic Aspects Objective: 2-4: Write exponential equations in logarithmic form and use an electronic calculator equipped with a natural logarithm function to determine the value of natural logarithms.

106) Evaluate: ln 300 Answer: ln 300 = 5.703782 Diff: 2 Type: SA Page Ref: 63-69 Topic: 2.4 Logarithms - Basic Aspects Objective: 2-4: Write exponential equations in logarithmic form and use an electronic calculator equipped with a natural logarithm function to determine the value of natural logarithms.

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107) Evaluate: ln 60 Answer: ln 60 = 4.094344562 Diff: 2 Type: SA Page Ref: 63-69 Topic: 2.4 Logarithms - Basic Aspects Objective: 2-4: Write exponential equations in logarithmic form and use an electronic calculator equipped with a natural logarithm function to determine the value of natural logarithms.

108) Evaluate: ln[400(1.177)] Answer: ln[400(1.177)] = ln 400 + ln 1.177 = ln 400 + 7(ln 1.17) = 5.9914645 + 7(.1570038) = 5.9914645 + 1.0990262 = 7.090491 Diff: 2 Type: SA Page Ref: 63-69 Topic: 2.4 Logarithms - Basic Aspects Objective: 2-4: Write exponential equations in logarithmic form and use an electronic calculator equipped with a natural logarithm function to determine the value of natural logarithms.

109) ln Answer: ln = ln = ln = ln = ln 8.270120604 = 2.112649092 Diff: 2 Type: SA Page Ref: 63-69 Topic: 2.4 Logarithms - Basic Aspects Objective: 2-4: Write exponential equations in logarithmic form and use an electronic calculator equipped with a natural logarithm function to determine the value of natural logarithms.

110) Solve: 8x = 40 Answer: x = =5 Diff: 3 Type: SA Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

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111) Solve: 2x = 40 Answer: x = = 20 Diff: 3 Type: SA Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

112) Solve: -5x = 35 Answer: x = = -7 Diff: 1 Type: SA Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

113) Solve: - x = 48 Answer: - x = 48, x = -72 Diff: 2 Type: SA Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

114) Solve: 0.04x = 37 Answer: x = = 925 Diff: 1 Type: SA Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

115) Solve:

= 0.24

Answer: x = 0.24(4) = 0.96 Diff: 1 Type: SA Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

116) Solve:

= 0.3

Answer: x = 0.3(8) = 2.4 Diff: 1 Type: SA Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

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117) Solve: - x = 15 Answer: x = 15 ∗ -8, x = -120 Diff: 1 Type: SA Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

118) Solve: - x = -49 Answer: x = -49 ∗

=

= 36.75

Diff: 1 Type: SA Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

119) Solve: -3x = 9 - 6x Answer: 3x = 9, x = 3 Diff: 1 Type: SA Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

120) Solve: 3x = 9 + 12x Answer: -9x = 9, x = -1 Diff: 1 Type: SA Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

121) Solve: 2x + 17 = 7x - 15 Answer: 17 + 15 = 7x - 2x, 32 = 5x, 6.4 = x Diff: 1 Type: SA Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

122) Solve: 2x + 17 = 8x - 3 Answer: 17 + 3 = 8x - 2x, 20 = 6x, 3.3333 = x Diff: 1 Type: SA Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

123) Solve: x - 0.23x = 2105 Answer: .77x = 2105, x =

= 2733.766

Diff: 1 Type: SA Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

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124) Solve: x + 0.307x = 640.20 Answer: 1.307x = 640.20, x =

= 489.824

Diff: 1 Type: SA Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

125) Solve: 51 - 14x = -34 - x Answer: 51 + 34 = -x + 14x, 85 = 13x, 6.538462 = x LS: 51 - 14(6.538462) = 51 - 91.53846 = -40.53846 RS: -34 - 6.53846 = -40.53846 Diff: 1 Type: SA Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

126) Solve: 4x - 8 - 19x = 210 + 7x - 4 Answer: 4x -8 - 19x = 210 + 7x - 4 -15x - 8 = 206 + 7x -8 - 206 = 7x + 15x -214 = 22x -9.7272727 = x LS: = 4(-9.7272727) - 8 - 19(-9.7272727) = -38.909091 - 8 + 184.81818 = 137.90909 RS: = 210 + 7(-9.7272727) - 4 = 206 - 68.090909 = 137.90909 Diff: 1 Type: SA Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

127) Solve: Answer:

- x= - x=

xx-

,

+

=

x+ x

520 + 1 = 55x + 12x, 521 = 67x, 7.7761194 = x Diff: 2 Type: SA Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

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128) Solve: 10(3 - x) + 2(x - 2) = 6(2x - 2) Answer: 10(3 - x) + 2(x - 2) = 6(2x - 2) 30 - 10x + 2x - 4 = 12x - 12 -10x + 2x - 12x = -12 - 30 + 4 -20x = -38 x = 1.9 Diff: 2 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

129) Solve: 4(2x - 5) + 3 = 3(x - 4) Answer: 4(2x - 5) + 3 = 3(x - 4) 8x - 20 + 3 = 3x - 12 8x - 3x = -12 + 20 - 3 5x = 5 x=1 Diff: 2 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

130) Solve: x Answer: x -

= =

+1 +1

(4)x - (4) = (4) + (4)1 4x - 2x = x + 4 4x - 2x - x = 4 x=4 Diff: 2 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

131) Solve: Answer:

-

-

(24) - (24) - (24)

=1 =1 = (24)1

(6)3 - 3x - (4)(x + 2) = 24 18 - 3x - 4x - 8 = 24 -7x = 14 x = -2 Diff: 2 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

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132) Solve: 5(2x - 4) - 3(1 - 3x) = -64 Answer: 5(2x - 4) -3(1 - 3x) = -64 10x - 20 - 3 + 9x = -64 19x = -41 x = 2.1578947 LS: 5[2(-2.1578947) - 4] - 3[1 - 3(-2.1578947)] = -64 5[-4.3157895 - 4] - 3[1 - (-6.4736842)] = -64 5[-8.3157895] - 3[7.4736842] = -64 -41.578948 - 22.421053 = -64 -64 = -64 RS: = -64 Diff: 2 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

133) Solve: 17 - 4(2x - 7) = 15x - 3(2x - 3) Answer: 17 - 4(2x - 7) = 15x - 3(2x - 3) 17 - 8x + 28 = 15x - 6x + 9 45 - 8x = 9x + 9 36 = 17x 2.117647 = x LS: 17 - 4[2(2.117647) - 7] 17 - 4(4.2353941 - 7) 17 - 4(-2.7647059) 17 + 11.058824 28.058824 RS: 15(2.117647) - 3[2(2.117647) - 3] 31.764706 - 3[4.2352941 - 3] 31.764706 - 3[1.2352941] 31.764706 - 3.7058823 = 28.058824 Diff: 2 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

134) Solve: x + x = 126 Answer: x + x = 126,

x = 126, x = 126 ×

, x = 81

Diff: 2 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

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135) Solve: 2 - x = x + Answer: 2 - x = x + 36 - 9x = 12x + 50 -14 = 21x - =x Diff: 2 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

136) Solve: Answer:

(4 - 3x) + (4 - 3x) +

= =

x - (2x - 3) x - (2x - 3)

112(4 - 3x) + 23 = 28x - 15(2x - 3) 448 - 336x + 23 = 28x - 30x + 45 471 - 336x = -2x + 45 426 = 334x 1.2754491 = x Diff: 3 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

137) Solve: (5x - 2) - (16x - 3) = Answer:

(5x - 2) - (16x - 3) =

+ 3x + 3x

80(5x - 2) - 36(16x - 3) = 17 + 180x 400x - 160 - 576x + 108 = 17 + 180x -176x - 52 = 17 + 180x -69 = 356x -.1938202 = x Diff: 3 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

138) Solve: I = Prt for r Answer: I = Prt, r = Diff: 1 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

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139) Solve: I = Prt for t Answer: I = Prt, t = Diff: 1 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

140) Solve: Answer:

=

for V

=

v(R + r) = Vr V= Diff: 2 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

141) Solve: Q = Answer: Q =

for p , 4Q = p - q, 4Q + q = p

Diff: 2 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

142) Solve: P = S(1 + i)-n for i Answer: P = S(1 + i)-n, = (1 + i)-n, = 1 + i, i=

= 1 + i,

-1

Diff: 3 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

143) Solve: S = P(1 + rt) for t Answer: S = P(1 + rt), S = P + Prt, S - P = Prt t= Diff: 2 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

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144) Solve: D = Answer: D =

for F ,

= E + F, F =

-E

Diff: 3 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

145) Solve: Answer:

=

for b

=

d(a + b) = bc ad + bd = bc ad = bc - bd ad = b(c - d) b= Diff: 2 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

146) Conor had to pay income taxes of $3 440.00 plus 22% of the amount by which his taxable income exceeded $36 000.00. If his tax bill was $3 684.00, calculate his taxable income.

Answer: Let the taxable income (in dollars) be x.

Then x - 36 000 is the amount that his income is greater than $36 000.

3440 + 0.22(x - 36 000) = 3684 3440 + 0.22x - 7920 = 3684 0.22x = 8164 x = $37 109.09 Diff: 2 Type: SA Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

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147) Taylor invests part of her $2 000 savings into a savings account at 6% and part into a GIC at 8% simple interest. If she gets $150 in interest from the two investments, calculate how much she invested at each rate.

Answer: Let the amount invested at 6% be $x.

Then the amount invested at 8% is (2000 - x).

0.06x + 0.08(2000 - x) = 150 0.06x + 160 - 0.08x = 150 -0.02x = -10 x = $500.00 at 6% 2000 - 500 = $1500.00 at 8% Diff: 2 Type: SA Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

148) Bow Valley Electronics sold a mini stereo set during a sale for $776. Determine the regular selling price of the set if the price of the set had been reduced by 1/4 of the original regular selling price.

Answer: Let the regular selling price be $x.

Sale price = $ ∴

x - x = 776

4x - x = 3104 3x = 3104 x = 1034.67 The regular selling price was $1034.67.

Diff: 2 Type: SA Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

149) After an increase of 1/9 of his current hourly wage, Pierre will receive a new hourly wage of $12.35. How much is his hourly wage before the increase?

Answer: Let the original hourly wage be $x.

New hourly wage = $ ∴

x + x = 12.35

9x + x = 111.15 10x = 111.15 x = 11.12 The hourly wage before increase was $11.12.

Diff: 2 Type: SA Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

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150) After a reduction of

of the selling price, a VCR was sold for $470.00. Determine the

regular selling price.

Answer: Let the regular price be y.

Then reduction in price is y. y-

y = 470 y = 470

y = $506.15 The regular selling price is $506.15.

Diff: 2 Type: SA Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

151) A rubber tube 120 cm long is cut into two pieces so that the longer piece is 30 cm longer than twice the length of the shorter piece. What is the length of the longer piece?

Answer: Let the shorter piece be x cm.

Length of the longer piece = (2x + 30) cm.

Total length = (x + 2x + 30) cm. ∴ x + 2x + 30 = 120 3x = 90 x = 30 The longer piece is 2(30) cm + 15 cm = 75 cm.

Diff: 2 Type: SA Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

152) A clothing store sells fancy hats at a gross margin of $3.50 each and ordinary hats at a gross margin of $5.00 each. During July, 110 hats were sold for a total gross margin of $460.00. How many fancy hats were sold?

Answer: Let the number of fancy hats be y.

Then the number of ordinary hats = 110 - y.

The total gross margin on fancy hats = $5(y).

The total gross margin on ordinary hats = $3.5(110 - y) 5y + 3.5(110 - y) = 460 5y + 385 - 3.5y = 460 1.5y = 75 y = 50 The number of fancy hats sold = 50.

Diff: 2 Type: SA Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

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153) An electronics company has been producing 1705 CD Players a day working two shifts.

The second shift has produced 95 CD players fewer than four-fifths of the number of CD players produced by the first shift. Determine the number of CD players produced by the second shift.

Answer: Let the number of CD players produced by the first shift be x.

Number of CD players produced by the second shift = x - 95.

Total production = x + x - 95 = 1705 ∴

x + x - 95 = 1705 x = 1800

x = 1000 Production by the second shift is x(1000) - 95 = 705.

Diff: 2 Type: SA Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

154) A machine requires five hours to make a unit of Product A and six hours to make a unit of Product B. Last month the machine operated for 250 hours producing a total of 60 units. How many units of Product A were produced?

Answer: Let the number of units of product A be x.

Then the number of units of product B is 60 - x.

The number of hours for product A is 5x.

The number of hours for product B is 6(60 - x). ∴ 5x + 6(60 - x) = 350 5x + 360 - 6x = 350 -x = -10 x = 10 Production of product A is 10 units.

Diff: 2 Type: SA Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

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155) The local amateur soccer club spent $1640 on tickets to a professional hockey game. If the club bought 2.5 times as many eight-dollar tickets than the number of twelve-dollar tickets and four fewer fifteen-dollar tickets than 7/10 the number of twelve dollar tickets, how many of each type of ticket did the club buy?

Answer: Let the number of $12 tickets be x.

Number of $8 tickets = 2.5x Number of $15 tickets = x - 4 Value of the $12 tickets = $12x Value of the $8 tickets = $8(2.5x) Value of the $15 tickets = $15( x - 4) ∴

12x + 8(2.5x) + 15 (7/10x - 4) = $1640 12x + 20x + 10.5x - 60 = 1640 42.5x = 1700 x = 40 Sales were 40 $12 tickets, 100 $8 tickets, and 24 $15 tickets.

Diff: 3 Type: SA Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

156) Evaluate s: s = ut + at2 for u = 15, a = 32, t = 5 Answer: s = 15(5) + (32)(5)2 = 75 + 400 = 475 Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

157) Evaluate s: s = ut + at2 for u = 20, a = 10, t = 5 Answer: s = 20(5) + (10)(5)2 = 100 + 125 = 225 Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

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158) Evaluate z: z = 5x2 - 5xy - 3y2 for x = -6, y = + 5 Answer: z = 5(-6)2 - 5(-6)(5) - 3(5)2 = 5(36) + 150 - 3(25) = 180 + 150 - 75 = 255 Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

159) Evaluate c: c = 8(7a - 4b) - 4(5a + 3b) for a = , b = Answer: c = 8 =8

-4

-4

=

+

-

+

=

+

= 12 + 55 = 67

Diff: 3 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

160) Evaluate K: K =

for N = 112, C = 250, P = 2450, n = 24

Answer: For N = 12, C = 400, P = 2000, n = 24 K= = = = .914286 Diff: 3 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

161) Evaluate T: T =

for I = 224, P = 6700, r = 0.11

Answer: For I = 324, P = 5400, r = 0.15 T= = = = .3039349 Diff: 3 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

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162) Evaluate P: P = S(1 - dt) for S = 1886, d = 0.15, t = Answer: P = 1886 = 1886(1 - .15 × .6821918) = 1886(1 - .1023288) = 1886(.8976712) = 1693.01 Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

163) Evaluate P: P =

for S = 1665, r = 0.14, t =

Answer: P =

=

=

=

= $1497.30

Diff: 3 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

164) Evaluate P: P =

for S = 1000, r = 0.1, t =

Answer: P =

=

=

=

= $952.38

Diff: 3 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

165) Compute: Answer: = 1.016315 Diff: 2 Type: SA Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

166) Compute: Answer:

=

=

= 14.93169

Diff: 3 Type: SA Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

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167) Compute: Answer:

=

=

= 27.36

Diff: 3 Type: SA Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

168) Compute: ln 1.257 Answer: ln 1.257 = .228728 Diff: 1 Type: SA Page Ref: 63-69 Topic: 2.4 Logarithms - Basic Aspects Objective: 2-4: Write exponential equations in logarithmic form and use an electronic calculator equipped with a natural logarithm function to determine the value of natural logarithms.

169) Compute: ln[3.00e-.3] Answer: ln(3.00e -.3) = ln 3.00 + ln e-.3 = ln 3.00 - .3 ln e = 1.0986123 -.3 = .7986123 Diff: 3 Type: SA Page Ref: 63-69 Topic: 2.4 Logarithms - Basic Aspects Objective: 2-4: Write exponential equations in logarithmic form and use an electronic calculator equipped with a natural logarithm function to determine the value of natural logarithms.

170) Solve: x - 0.26x = 8.96 Answer: x - .26x = 8.96, .74x = 8.96, x = 12.10811 Diff: 1 Type: SA Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

171) Solve: x - 0.75x = 9.00 Answer: x - .75x = 9.00, .25x = 9.00, x = 36.00 Diff: 1 Type: SA Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

172) Solve: 0.4x - 4 = 6 - 0.8x Answer: .4x - 4 = 6 - .8x, 1.2x = 10, x = 8.33333333 Diff: 1 Type: SA Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

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173) Solve: (3 - 5x) - (9x - 1) = 80 Answer: (3 - 5x) - (9x - 1) = 80 3 - 5x - 9x + 1 = 80 4 - 14x = 80 -14x = 76 x = -5.42857 Diff: 2 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

174) Solve: 5(8x - 2) - 5(3x + 5) = 36 Answer: 5(8x - 2) -5(3x + 5) = 36 40x - 10 -15x - 25 = 36 25x - 35 = 36 25x = 71 x = 2.84 Diff: 2 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

175) Solve: x + Answer: x +

x+ x+

+ x + x + 1 = 256 + x + x + 1 = 256

x + .7x + 1.8x + 1.5 = 256 3.5x = 254.5 x = 72.71429 Diff: 3 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

176) After reducing the regular selling price by 1/7, Moon Electronics sold a TV set for $294.

What was the regular selling price?

Answer: Let the regular selling price be $x.

Reduction in price + $ x x - x = 294 x = 294 x = $343.00 Diff: 2 Type: SA Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

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177) After reducing the regular selling price by 1/8, Sepaba Inc. sold a Stereo set for $300. What was the regular selling price?

Answer: Let the regular selling price be $x.

Reduction in price + $ x x - x = 300 x = 300 x = $342.86 Diff: 2 Type: SA Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

178) The zinc department of a factory occupies 500 square metres more than 2 times the floor space occupied by the copper department. The total floor space is 9500 square metres. Determine the floor space occupied by the cooper department.

Answer: Let the floor space occupied by copper be x.

Floor space occupied by zinc = 2x + 500 Total floor space = x + 2x + 500 ∴ x + 2x + 500 = 9500 3x = 9000 x = 3000 The floor space occupied by copper is 3000 square metres.

Diff: 2 Type: SA Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

179) A company employs 204 employees. There are three shifts. There are three times as many on the first shift as on the second shift, and four more on the third shift than on the second shift.

Determine how many were on each shift.

Answer: Let x be the number on the second shift.

Then 3x is the number on the first shift.

And x + 4 is the number on the third shift. x + 3x + (x + 4) = 204 5x = 200 x = 40 on the second shift 3x = 120 on the first shift x + 4 = 44 on the third shift Diff: 2 Type: SA Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

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180) A machine requires 4 hours to make a unit of Product A and 7 hours to make a unit of Product B. The machine operated for 810 hours producing a total of 150 units. How many units of Product B were produced?

Answer: Let the number of units of Product A be x.

Number of units of Product B = 150 - x.

Number of hours for Product A = 4x.

Number of hours for Product B = 7(150 - x). ∴ 4x + 7(150 - x) = 810 4x + 1050 - 7x = 810 -3x = -240 x = 80 The number of units if Product B is 150 - 80 = 70.

Diff: 2 Type: SA Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

181) Simplify: (5x - 4)(3x + 1) A) 15x2 - 7x + 4 B) 15x2 - 7x - 4 C) 15x2 + 7x - 4 D) -15x2 - 7x + 4 E) -10x2 - 7x + 4 Answer: B Diff: 1 Type: MC Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

182) Simplify: A) 20a4b4c5 B) 5a4b4c5 C) 5a3b2c2 D) 20a3b2c2 E) 55a4b4c5 Answer: B Diff: 1 Type: MC Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

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183) Simplify: (3)2(3)5 A) 30 B) 90 C) 59 049 D) 2187 E) 120 Answer: D Diff: 1 Type: MC Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

184) Simplify: A) 16777216 B) 17666216 C) 12222617 D) 17222167 E) 17333167 Answer: A Diff: 1 Type: MC Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

185) Compute the value of (four decimal places): A) .0045 B) .5449 C) .4459 D) .0445 E) 0.044946 Answer: E Diff: 1 Type: MC Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

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186) Simplify: (m2)6 A) m12 B) m-4 C) m8 D) m3 E) m2 Answer: A Diff: 1 Type: MC Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

187) Simplify: [(33) - 62]3 A) 279 B) -279 C) 729 D) -729 E) 972 Answer: D Diff: 1 Type: MC Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

188) Calculate the following: ln A) 5.145 B) 1.545 C) -5.154 D) -1.545 E) -5.145 Answer: E Diff: 1 Type: MC Page Ref: 63-69 Topic: 2.4 Logarithms - Basic Aspects Objective: 2-4: Write exponential equations in logarithmic form and use an electronic calculator equipped with a natural logarithm function to determine the value of natural logarithms.

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189) Solve the following equation: 5x - 4 + 9 = -3x - 2 - 13 A) 2.5 B) -2.5 C) 20 D) -20 E) -25 Answer: B Diff: 1 Type: MC Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

190) Solve the following and check your solutions: 12x + 5(9 - x) = 429 A) 58.86 B) -58.86 C) 54.14 D) -54.14 E) -5.14 Answer: A Diff: 1 Type: MC Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

191) You have a lotto ticket with three numbers between zero and 49. The total of the three numbers is 93. One number is twice as large plus two as the lowest number. The second number is the size of the smaller number. What are the values of each of the numbers?

A) 1-44, 2-28, 3-21 B) 1-41, 2-31, 3-21 C) 1-44, 2-25, 3-24 D) 1-44, 2-20, 3-15 E) 1-44, 2-15, 3-20 Answer: A Diff: 3 Type: MC Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

192) Simplify: 11.57843/7 A) 3.857 B) 4.857 C) 2.857 D) 2.587 E) 4.785 Answer: C Diff: 1 Type: MC Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

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193) You have three colors of candies a jar - yellow, red and blue. There are 4 times plus 3 as many yellow candies as there are blue candies. There is 5/8 as many minus 6 red candies as there are blue. There are a total of 402 candies in the jar. How many of yellow, blue and red candies are there?

A) y-290, b-73, r-39 B) y-291, b-73, r-38 C) y-291, b-72, r-39 D) y-292, b-72, r-38 E) y-292, b-72, r-37 Answer: C Diff: 3 Type: MC Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

194) Following equation is used in carbon dating of the artefacts: N= × where, N = Decay rate of the artefact, expressed as disintegrations per minute (dpm) = Decay rate of natural carbon = 14 dpm τ = Mean life time =

=

= 8267 years

t = Age of the artefact Calculate the age of the artefact, if the decay rate of the artefact is measured as 4 dpm Answer: N =

×

⇒

ln

⇒ ln

= =

⇒ t = -τ × ln

because ln(e) = 1

Plugging the values in the above equation, we get: t = -8267 × ln ⇒ t = -8267 × -1.253 ⇒ t = 10357 Age of the artefact is 10,357 years Diff: 3 Type: SA Page Ref: 63-69 Topic: 2.4 Logarithms - Basic Aspects Objective: 2-4: Write exponential equations in logarithmic form and use an electronic calculator equipped with a natural logarithm function to determine the value of natural logarithms.

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195) Following equation is used in carbon dating of the artefacts: N= × where, N = Decay rate of the artefact, expressed as disintegrations per minute (dpm) = Decay rate of natural carbon = 14 dpm τ = Mean life time =

=

= 8267 years

t = Age of the artefact What is the expected decay rate of the artefact, if it is known to be from Canadian New France era, 350 years ago.

Answer: N = × Plugging the values in the above equation, we get N = 14 ×

= 14 × 0.959 = 13.4 dpm

Diff: 2 Type: SA Page Ref: 63-69 Topic: 2.4 Logarithms - Basic Aspects Objective: 2-4: Write exponential equations in logarithmic form and use an electronic calculator equipped with a natural logarithm function to determine the value of natural logarithms.

196) Find b, if = 0.25 A) -0.0625 B) -1.386 C) -0.347 D) 0.347 E) -0.229 Answer: D Diff: 2 Type: MC Page Ref: 63-69 Topic: 2.4 Logarithms - Basic Aspects Objective: 2-4: Write exponential equations in logarithmic form and use an electronic calculator equipped with a natural logarithm function to determine the value of natural logarithms.

197) Calculate ln A) -1.16 B) 0.06 C) 6.458 D) 4.138 E) 198.84 Answer: D Diff: 2 Type: MC Page Ref: 63-69 Topic: 2.4 Logarithms - Basic Aspects Objective: 2-4: Write exponential equations in logarithmic form and use an electronic calculator equipped with a natural logarithm function to determine the value of natural logarithms.

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198) Calculate ln A) 9.75 B) 17162 C) 2653.29 D) 10.52 E) 11.23 Answer: A Diff: 2 Type: MC Page Ref: 63-69 Topic: 2.4 Logarithms - Basic Aspects Objective: 2-4: Write exponential equations in logarithmic form and use an electronic calculator equipped with a natural logarithm function to determine the value of natural logarithms.

199) In the following equation: = PMT calculate n, if = 75,000; PMT = 3500; i = 0.028 Answer: Plugging the values in the above equation: 75000 = 3500 ⇒ 0.6 = 1 ⇒ = 0.4 ⇒ -n ln(1.028) = ln (0.4) ⇒ -n(0.027615) = -0.916291 ⇒ n = 33.180706 Diff: 2 Type: SA Page Ref: 63-69 Topic: 2.4 Logarithms - Basic Aspects Objective: 2-4: Write exponential equations in logarithmic form and use an electronic calculator equipped with a natural logarithm function to determine the value of natural logarithms.

200) Evaluate ln A) 5505 B) 8.613 C) 112.35 D) 104.66 E) 8.786 Answer: B Diff: 2 Type: MC Page Ref: 63-69 Topic: 2.4 Logarithms - Basic Aspects Objective: 2-4: Write exponential equations in logarithmic form and use an electronic calculator equipped with a natural logarithm function to determine the value of natural logarithms.

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201) Simplify: A) 3 B) 0.333 C) 531,441 D) 0.00000188 E) 1 Answer: E Diff: 1 Type: MC Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

202) Simplify: A) 8.000015625 B) 8 C) 8.304 D) 11.39 E) 91.125 Answer: C Diff: 1 Type: MC Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

203) Evaluate: A) 32768 B) -32768 C) -40 D) 256 E) -30 Answer: B Diff: 1 Type: MC Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

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204) Simplify A)

+

B) C) D) E) Answer: D Diff: 1 Type: MC Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

205) Evaluate A) 1 B) 9 C) 2.08 D) 729 E) Answer: B Diff: 1 Type: MC Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

206) Evaluate 5000 A) 0.08 B) 5000 C) 8425.29 D) 5281.12 E) 25000 Answer: C Diff: 1 Type: MC Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

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207) Evaluate: 1862.14 Answer: 1862.14

= 1862.14

= 1862.14 = 1862.14[11.07931]-1 = 168.07 Diff: 2 Type: SA Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

208) Evaluate: $5000 Answer: $5000

=

= $100,000

Diff: 1 Type: SA Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

209) Evaluate:

Answer: = = 199 Diff: 2 Type: SA Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

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210) Evaluate:

Answer:

= = 979.84 Diff: 2 Type: SA Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

211) Simplify: (a + b + c)(a2 + b2 + c2 - ab - bc - ca) Answer: (a + b + c)(a2 + b2 + c2 - ab - bc - ca) = a(a2 + b2 + c2 - ab - bc - ca) + b(a2 + b2 + c2 - ab - bc - ca) + c(a2 + b2 + c2 - ab - bc - ca) = a3 + ab2 + ac2 - a2b - abc - ca2 + ba2 + b3 + bc2 - ab2 - b2c - abc + ca2 + b2c + c3 - abc - bc2 - ac2 = a3 + b3 + c3 - 3abc Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

212) Simplify: (a + b)3 Answer: (a + b)3 = (a + b)(a + b)2 = (a + b)(a2 + 2ab + b2) = a3 + 3a2b + 3ab2 + b3 Diff: 1 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

213) Simplify: 7x A) x - 4y B) 11x - 12y C) x + 12y D) 3x + 12y E) 3x - 4y Answer: A Diff: 1 Type: MC Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

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214) Simplify: x - 2y - [4x - 6y - {3x - z + 2(2x - 4y + z)}] Answer: x - 2y - [4x - 6y - {3x - z + 2(2x - 4y + z)}] = x - 2y - [4x - 6y - {3x - z + 4x - 8y + 2z}] = x - 2y - [4x - 6y - {7x + z - 8y}] = x - 2y - [4x - 6y - 7x - z + 8y] = x - 2y - [-3x + 2y - z] = x - 2y + 3x - 2y + z = 4x - 4y + z Diff: 2 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

215) Solve: 2x + 5 = 7 A) x = 1 B) x = 6 C) x = 2 D) x = 4 E) x = Answer: A Diff: 1 Type: MC Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

216) Solve: 8x - 11 = 5x + 4 A) x = B) x = C) x = 5 D) x = 15 E) x = 4 Answer: C Diff: 1 Type: MC Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

217) Solve: 0.5x - 0.75 + 9x = 5x + 1.5 A) x = 0.05 B) x = 0.155 C) x = -0.5 D) x = 0.5 E) x = 0.55 Answer: D Diff: 1 Type: MC Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

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218) Solve: y = 192 + 0.04y A) y = 184.62 B) y = 192 C) y = 200 D) y = 320 E) y = 137.14 Answer: C Diff: 1 Type: MC Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

219) Solve and find the value of a, given 3a + 4(15-2a) = 20 A) a = B) a = 7 C) a = 5 D) a = -1 E) a = 8 Answer: E Diff: 2 Type: MC Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

220) Solve and find the value of y, given 3(1-2y) + 5y = 5 Answer: 3(1-2y) + 5y = 5 ⇒ -y + 3 = 5 ⇒ y = -2 Diff: 1 Type: SA Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

221) Solve:

Answer: ⇒

+ 2x

+ 2x

= $115.10

= $115.10

+ 2.11452x = $115.10

⇒ 3.06442x = $115.10 ⇒ x = $37.56 Diff: 2 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

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222) Solve: x

+ 2x

= $2551.65

Answer: 1.04438x + 2x(1.02096)-1 = $2551.65 ⇒ 1.04438x + 1.95894x = $2551.65 ⇒ x = $849.61 Diff: 2 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

223) Solve: x(1.05)3 + $1000 +

=

Answer: 1.157625x + 0.710681x = $11791.38 - $1000 ⇒x=

⇒ x = $5776.02 Diff: 1 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

224) Solve and find the value of x, given:

=

A) x = 20 B) x = -9 C) x = 9.02 D) -17.16 E) 4.33 Answer: C Diff: 2 Type: MC Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

225) Luxury furniture is promoting a no HST (13%) event for the fall sale. What is the actual selling price for the Sofa before tax shown on your receipt, if the ticket price of the sofa is $795.00?

A) $795.00 B) $6,115.38 C) $103.35 D) $898.35 E) $703.54 Answer: E Diff: 1 Type: MC Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

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226) Sobeys sells fruit trays consisting of pineapple and melons. The manager of the fruit department obtains pineapples at a wholesale price of $2.50 per kg, and melons at $1.85 per kg.

He is required to produce 10 kg of the mixed fruit. What is the maximum weight of pineapple that he can put in the mix in order to have an effective wholesale cost no greater than $2.00 per kg?

A) 2.31 kg B) 7.69 kg C) 4.56 kg D) 4 kg E) 5.41 kg Answer: A Diff: 2 Type: MC Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

227) Sobeys sells fruit trays consisting of pineapple and melons. The manager of the fruit department obtains pineapples at a wholesale price of $2.50 per kg, grapes at $2.15 per kg, strawberries at $1.50 per kg and melons at $1.85 per kg. He is required to produce 10 kg of the mixed fruit. He is required to add 2 kg of strawberries and 3 kg of grapes. What is the maximum weight of pineapple that he can put in the mix in order to have an effective wholesale cost no greater than $2.00 per kg?

Answer: Cost of 2 kg of strawberries = $1.50 × 2 = $3.00 Cost of 3 kg of grapes = $2.15 × 3 = $6.45 Total cost of the mixed fruit = $2 × 10 = $20 Cost of pineapple and melons = $20 - ($3 + $6.45) = $10.55 ⇒ 2.5p + 1.85m = 10.55 Maximum weight of pineapple and melons = 10 - (2 + 3) = 5kg ∴ 2.5p + 1.85(5-p) = 10.55 ⇒ 0.65p + 9.25 = 10.55 ⇒ p= =2 ∴ Maximum weight of pineapple = 2 kg Diff: 2 Type: SA Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

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228) ABC financial has introduced a stock option incentive program. For a total of 301,375 options, each of the 3 executives receives twice as many options as the senior managers. Each senior manager receives twice the options as each of the middle managers and each of the middle managers receives 1.5 times the options as each of the employee. If there are 25 senior managers, 75 middle managers and 1000 employees, how many options will the each executive receive?

A) 250 B) 375 C) 750 D) 1500 E) 4500 Answer: D Diff: 2 Type: MC Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

229) Sleep Inc. reduced the price of the Sealy mattress by 20% for a spring sale. What was the regular price of the mattress, if the sale price is $649.95?

A) $129.99 B) $779.94 C) $3,249.75 D) $812.44 E) $649.95 Answer: D Diff: 1 Type: MC Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

230) Blue Mountain resort charges $39 for a single ticket for high ropes and $29 for a single ticket for low ropes. If a day's total revenue from the sale of 540 passes is $18,910, how many tickets were sold for high ropes?

Answer: 39HR + 29(540 - HR) = 18910 ⇒ HR = = 325 325 tickets were sold for high ropes Diff: 3 Type: SA Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

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231) Age difference between my son and me is 30 years. Sum of our ages is 54. What is my age now?

A) 12 B) 42 C) 38 D) 45 E) 15 Answer: B Diff: 1 Type: MC Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

232) Transpipe owns 47% ownership stake in BP. Cameo owns a 29% stake in the BP. Suppose Transpipe sells 62.5% of its stake for $47 Million. If Comeo uses that transaction as the basis for calculating the value of its own 29% position, what value will Cameo obtain?

A) $18.1 Million B) $46.4 Million C) $16 Million D) $47 Million E) $29 Million Answer: B Diff: 2 Type: MC Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

233) Simplify: -(3a + 7ab - 5) - (12 + 6ab - 5a) Answer: = -3a - 7ab + 5 - 12 - 6ab + 5a = 2a - 13ab - 7 Diff: 4 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

234) Simplify: (x + 4)(2x2 - 9x + 3) Answer: 2x3 - 9x2 + 3x + 8x2 - 36x + 12 = 2x3 - x2 - 33x + 12 Diff: 4 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

235) Simplify: -3w(4z + 1) - 2z(6w + 2) Answer: -12wz - 3w + 24wz - 8z = -3w + 12wz - 8z Diff: 3 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

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236) Solve: (6x2 + x - 1) - (2x2 -12x + 4) Answer:

for x = 7

[6(7)2 + 7 - 1] - [2(7)2 -12(7) + 4]

= (294 + 7 — 1) - (98 -84 + 4) = (300) - (18) = 91 Diff: 3 Type: SA Page Ref: 44-49 Topic: 2.1 Simplification of Algebraic Expressions Objective: 2-1: Simplify algebraic expressions using fundamental operations and substitution.

237) Simplify: 29 ÷ 23 × 24 A) 22 B) 28 C) 27 D) 210 Answer: D Diff: 2 Type: MC Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

238) Simplify:

÷

÷

Answer:

=

=

Diff: 3 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

239) Expand: (3xyz)3 Answer: 33x3y3z3 = 27x3y3z3 Diff: 3 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

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240) Solve: 635241(1093)0 Answer: 635241(1093)0 = 635241 × 1 = 635241 Diff: 2 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

-2

241) Simplify: Answer:

-2

= (x + 2)2/ x2 = (x2 + 4x + 4)/ x2 = 1 + (4/x) + (4/x2) Diff: 4 Type: SA Page Ref: 51-58 Topic: 2.2 Integral Exponents Objective: 2-2: Simplify and evaluate powers with positive exponents, negative exponents, and exponent zero.

242) Calculate: Answer: 67 Diff: 2 Type: SA Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

243) Calculate: Answer: 6 Diff: 3 Type: SA Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

244) Calculate up to 4 decimals: Answer: 3.3065 Diff: 3 Type: SA Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

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245) Calculate: (5489031744)1/6 Answer: 42 Diff: 4 Type: SA Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

246) Calculate with final answer in fractional form: 390625-1/8 Answer: Diff: 4 Type: SA Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

247) Calculate up to 4 decimals: 48268091/6 Answer: 13 Diff: 4 Type: SA Page Ref: 59-62 Topic: 2.3 Fractional Exponents Objective: 2-3: Use an electronic calculator to compute the numerical value of arithmetic expressions involving fractional exponents.

248) Express in logarithmic form: 8-3 = Answer: log8

= -3

Diff: 3 Type: SA Page Ref: 63-67 Topic: 2.4 Logarithms - Basic Aspects Objective: 2-4: Write exponential equations in logarithmic form and use an electronic calculator equipped with a natural logarithm function to determine the value of natural logarithms.

249) Express in logarithmic form: e4x = 20 Answer: 4x = ln 20 x = ln 20 Diff: 4 Type: SA Page Ref: 63-67 Topic: 2.4 Logarithms - Basic Aspects Objective: 2-4: Write exponential equations in logarithmic form and use an electronic calculator equipped with a natural logarithm function to determine the value of natural logarithms.

250) Express in exponential form: log3(243) = 5 Answer: 35 = 243 Diff: 2 Type: SA Page Ref: 63-67 Topic: 2.4 Logarithms - Basic Aspects Objective: 2-4: Write exponential equations in logarithmic form and use an electronic calculator equipped with a natural logarithm function to determine the value of natural logarithms.

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251) Express in exponential form: log-4(4096) = 6 Answer: (-4)6 = 4096 Diff: 3 Type: SA Page Ref: 63-67 Topic: 2.4 Logarithms - Basic Aspects Objective: 2-4: Write exponential equations in logarithmic form and use an electronic calculator equipped with a natural logarithm function to determine the value of natural logarithms.

252) Calculate up to 4 decimal places: ln 16 Answer: 2.7726 Diff: 3 Type: SA Page Ref: 63-67 Topic: 2.4 Logarithms - Basic Aspects Objective: 2-4: Write exponential equations in logarithmic form and use an electronic calculator equipped with a natural logarithm function to determine the value of natural logarithms.

253) Calculate up to 4 decimal places: ln [400(

)]

Answer: 2.5903 Diff: 5 Type: SA Page Ref: 63-67 Topic: 2.4 Logarithms - Basic Aspects Objective: 2-4: Write exponential equations in logarithmic form and use an electronic calculator equipped with a natural logarithm function to determine the value of natural logarithms.

254) Solve for x: x + 14 = -7 Answer: x = -7 - 14 = -21 Diff: 2 Type: SA Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

255) Solve for x: -5x = 8 - 4x Answer: -4x + 5x = 8 x=8 Diff: 2 Type: SA Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

256) Solve for x: 2x - 1.5x = 410 Answer: 0.5x = 410 x = 820 Diff: 3 Type: SA Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

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257) Solve for x: - x = 8 Answer: (-7) - x = 8(-7) x = -56 Diff: 3 Type: SA Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

258) Solve for x: -6x = 486 + 3x Answer: -9x = 486 x = -54 Diff: 3 Type: SA Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

259) Solve for x and check your answer: 8x + 14 = 12x + 22 Answer: 14 - 22 = 12x - 8x -8 = 4x -2 = x Check: 8(-2) + 14 = 12(-2) + 22 -16 + 14 = -24 + 22 -2 = -2 Diff: 4 Type: SA Page Ref: 71-75 Topic: 2.5 Solving Basic Equations Objective: 2-5: Solve basic equations using addition, subtraction, multiplication, and division.

260) Solve for x: 2x + 4(5x - 3) = -7(2 + x) - (-11x -11) Answer: 2x + 20x - 12 = -14 - 7x + 11x + 11 22x - 4x = -3 + 12 18x = 9 x = 0.5 Diff: 3 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

261) Solve for x: x - x = Answer: (8) x - (8) x = (8) 4(5x) - 2(3x) = 14 14x = 14 x=1 Diff: 3 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

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262) Solve for x: x + x = 22 Answer: (8)x + (8) x = (8)22 11x = 176 x = 16 Diff: 2 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

263) Solve for x (answer will be a decimal) (x + 2) - (2x + 2) = Answer: (24) (x + 2) -(24) (2x + 2) = (24) (4)(5)(x + 2) — 8(2x + 2) = 3(2) 20(x + 2) — (16x - 16) = 6 4x = -50 x = 12.5 Diff: 4 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

264) Rearrange for r: A = πr2 Answer: = r2 =r Diff: 3 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

265) Rearrange for b: a2 + b2 = c2 Answer: b2 = c2 + a2 b= Diff: 3 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

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266) Rearrange for c: x = Answer: 2ax = -b ± 2ax + b = (2ax + b)2 = b2 - 4ac 4a2x2 + 4abx + b2 = b2 - 4ac 4a2x2 + 4abx + b2 - b2 = -4ac -4a2x2 - 4abx = 4ac -

=

-ax2 - bx = c Diff: 5 Type: SA Page Ref: 76-79 Topic: 2.6 Solving Equations Involving Algebraic Simplification Objective: 2-6: Solve equations involving algebraic simplification and formula rearrangement.

267) A smartphone was being sold for $660 while on sale. If the price dropped by 20% for the sale, what was the original price of the smartphone?

Answer: Let x represent the original smartphone's price Since a 20% drop in price equates to , (x - x) can represent the sale price x - x = 660 x = 660 x = (660) x = 825 Diff: 3 Type: SA Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

268) Carlos went to the mall to buy toys for his children and nephews with a total of $1300.

After he was done shopping, he had $400 left in his account. Carlos's expenditure on doll sets was $100 less than four times the amount he spent on toy cars. How much money did Carlos spend on doll sets?

Answer: Let x represent Carlos's expenditure on toy cars. Consequently, the expenditure on doll sets can be represented with the expression 4x - 100. Since Carlos started with $1300 and was left with $400, we can assume he spent $900 at the mall. From this info, we can create the equation: x + 4x - 100 = 900 5x = 1000 x = 200 Diff: 4 Type: SA Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

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269) Usually, Bob's Burgers sells x burgers for p dollars each. But today, the price was lowered by 22% and as a result, 60% more burgers were sold. Which of the below represents the revenue for today's burger sales, in dollars?

A) 0.6x - 0.22p B) 1.15xp C) 1.248xp D) 1.455xp Answer: C Diff: 2 Type: MC Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

270) Sony has been producing 1710 VR headsets a day through two work shifts. The second shift has produced 90 fewer headsets than seven-fifths of the number of headsets produced by the first shift. What is the number of VR headsets produced by the second shift in a day?

Answer: Let x represent the number of VR headsets produced by the first shift. Consequently, the number of VR headsets made by the second shift can be represented through the expression x - 90. Since 1675 headsets are produced daily, the equation formed is: x + x - 90 = 1710 x = 1620 x=

(1620)

x = 675 Diff: 4 Type: SA Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

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271) Old Navy had $940 worth of orders for shirts. The prices for the shirts were categorized by style: $10 for tank tops, $14 for graphic tees, and $22 for polos. The number of polos ordered was one more than half the number of graphic tees, and the number of graphic tees ordered was eight less than twice the number of tank tops. Determine the number of each type of shirt ordered.

Answer: Let x represent the number of tank tops, let 2x - 8 represent the number of graphic tees sold, and let (2x - 8) + 1 represent the number of polos sold. Taking the price and the value of the combined orders into consideration, the equation is as follows: 10x + 14(2x - 8) + 22[ (2x - 8)] = 940 10x + 28x - 112 + 22[x - 4] = 940 38x + 22x - 88 = 1052 60x = 1140 x = 19 2(19) - 8 = 30 Graphic Tees 2(19) - 8] + 1 = 16 Polos Diff: 5 Type: SA Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

272) Zain began with three times more money than Max. After Zain gave Max $18, Zain still had $6 more than Max. How much money do they have altogether?

Answer: Let x represent the amount of money Brock has to start (3x represents Zain) 2x - 18 = x + 6 + 18 2x - 18 = x + 24 2x - x = 42 x = 42 3x = 3(42) = 126 Diff: 3 Type: SA Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

273) The rapper Drake hosts a concert at the Air Canada Center, where the ticket price is $240.

However, the price of the individual ticket includes the 13% HST. What is the original price of the ticket, excluding the HST? Answer: Let x represent the price of a concert ticket, excluding HST 1.13x = 240 x= x = 212.39 Diff: 2 Type: SA Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

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274) At the beginning of the Toronto FC game, 1000 spectators left, leaving only

of the stadium's seats were full. At halftime,

of the seats full. In total, how many seats are in the stadium?

Answer: Let x represent the total number of seats in the stadium x - 1000 = x x - x = 1000 x-

x = 1000

x = 1000 x = 21 000 Diff: 3 Type: SA Page Ref: 81-84 Topic: 2.7 Solving Word Problems Objective: 2-7: Solve word problems by creating and solving equations.

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